a. Mechanical timing relays: The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control. Its operation is almost similar to that of a control relay. The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized. One example for mechanical timing relay is Pneumatic timing relay. There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer. Each type will have different kinds of contacts such as closed contacts and open contacts.

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Answer 1

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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2. Draw the timing diagram for the Clocked SR flip-flop at each of the instants t0 to t6 as described in the class meeting. a. at t0, Q is low, S is low, R is low b. at t0, Q is high, S is low, R is low Be sure to include the clock signal in the timing diagram.

* the state diagram for the following timing diagram is CK a/1 /PS Z e/0 a/1 b/0 f/1 0/p c/0 e/1 c/0 0/P B O A 1 a/1 g/0 b/0 f/1 1 e/1 c/0 1 d/0 None of the above O C

Design a 1-minute timer using a 60 Hz power line as an interrupting source. The output ports should display minutes and seconds in BCD. At the end of the minute, the output ports should continue displaying one minute and zero seconds.

Answer 2

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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See solution

Answer 3

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 6

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Answer 7

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Answer 8

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Answer 9

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Answer 10

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Answer 11

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Answer 12

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 13

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

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Answer 17

Ch. 7 - Prob. 1RQ Ch. 7 - Prob. 2RQ Ch. 7 - Prob. 3RQ Ch. 7 - Prob. 4RQ Ch. 7 - a. What are the two methods commonly used to...Ch. 7 - Prob. 6RQ Ch. 7 - Prob. 7RQ Ch. 7 - Prob. 8RQ Ch. 7 - For a TOF timer: a. When is the enable bit of a...Ch. 7 - Explain what each of the following quantities...

Concept explainers

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Want to see the full answer?

Chapter 7 Solutions

Concept explainers

Explanation of Solution

b. Normally Closed Timed Open (NCTO) contact: The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c. Normally Open Timed Open (NOTO) contact: The symbol used to represent a NOTO contact is given below. NOTO contact is an off-delay time based contact...

Explanation of Solution

d. Normally Closed Timed Closed (NCTC) contact: The symbol used to represent a NCTC contact is given below. NCTC contact is an off-delay time based contact...

Want to see the full answer?

Chapter 7 Solutions

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...